package com.utils.basejava.jdk8;

public class LambdaTester {
	   public static void main(String args[]){
	      LambdaTester tester = new LambdaTester();
	        
	      // 类型声明
	      MathOperation addition = (int a, int b) -> a + b;
	        
	      // 不用类型声明
	      MathOperation subtraction = (a, b) -> a - b;
	        
	      // 大括号中的返回语句
	      MathOperation multiplication = (int a, int b) -> { return a * b; };
	        
	      // 没有大括号及返回语句
	      MathOperation division = (int a, int b) -> a / b;
	        
	      System.out.println("10 + 5 = " + tester.operate(10, 5, addition));
	      System.out.println("10 - 5 = " + tester.operate(10, 5, subtraction));
	      System.out.println("10 x 5 = " + tester.operate(10, 5, multiplication));
	      System.out.println("10 / 5 = " + tester.operate(10, 5, division));
	        
	      // 不用括号
	      GreetingService greetService1 = message ->
	      System.out.println("Hello " + message);
	        
	      // 用括号
	      GreetingService greetService2 = (message) ->
	      System.out.println("Hello " + message);
	        
	      greetService1.sayMessage("Runoob");
	      greetService2.sayMessage("Google");
	   }
	    
	   interface MathOperation {
	      int operation(int a, int b);
	   }
	    
	   interface GreetingService {
	      void sayMessage(String message);
	   }
	    
	   private int operate(int a, int b, MathOperation mathOperation){
	      return mathOperation.operation(a, b);
	   }
	}
